The Momentum Series have been designed with the avid bicycle commuter in mind. Whether the commute is beating city traffic or on rural roads avoiding highway speeds, these packs offer practical solutions for the bike commute lifestyle. Features include an ultra-tight fitting raincover, blinky patch, U-lock pocket, hydration compatibility and a LidLockTM for quick helmet stow. For an easy transition to work day activities, features include a dedicated laptop sleeve, padded top and side briefcase handles, and a stowable harness and hipbelt.....The Momentum 34 features a zippered expansion panel creating an additional 8 liters of capacity when needed, making this an ideal year round commuter pack.